Turbo-supercharger exhaust

ABSTRACT

A stress-free exhaust construction for a turbo-supercharger on an engine, having an adjacent wall through which exhaust gases are discharged. A rigid conduit member is connected to and extends away from the supercharger. A second rigid conduit member in alignment with the first conduit extends through the wall. There are cooperating baffles at the adjacent ends of the two conduit members which provide a non-rigid connection between the two conduit members. One of the baffles forms a reservoir which contains a liquid, forming a seal which prevents the escape of exhaust gases.

United States Patent Gibson 1 Oct. 7, 1975 [54] TURBO'SUPERCHARGER EXHAUST FOREIGN PATENTS OR APPLICATIONS 1 1 lnvemorl Ira Gibson, p Mich- 6,186 3/1903 United Kingdom 285/11 20,983 /1914 United Kingdom 285/10 [73] Ass'gne6' g 'w g Cmnpany 149,893 6/1937 Austria 277/56 anan 739,715 11/1955 United Kingdom /308 [22] il M 1974 1,185,488 2/1959 France 277/57 [21] Appl' 467l Primary Examiner-Werner 11-1. Schroeder Assistant Examiner-Moshe 1. Cohen [52] U.S. Cl. 60/280; 60/322; 180/64 A; y, g n r Firm-Kenneth C. Witt 277/57; 277/ R; 285/10; 285/48; 285/331 [51] Int. Cl. F01N 5/04 [57] ABSTRACT [58] Field of Search 285/13, 14, 41, 187, 223, A Stressree, exhaust construction for a wrb0 285/330 3311277/533 561 135 supercharger on an engine, having an adjacent wall 57; 60/687, 3171 through which exhaust gases are discharged. A rigid 3932 308; /64 A conduit member is connected to and extends away from the supercharger. A second rigid conduit mem- [56] References Clted ber in alignment with the first conduit extends through UNITED STATES PATENTS the wall. There are cooperating baffles at the adjacent 1,244,722 10/1917 Finnc 285/13 x ends of the two conduit members which Provide 9 2,130,385 9/1938 Fluor, Jr. et a1... 60/320 X non-rigid connection between the two conduit mem- 2,583430 /l952 Kad na y I 60/280 X bers. One of the baffles forms a reservoir which con- 2,677,23l 5/1954 Cornelius 60/308 tains a liquid, forming a seal which prevents the es- 2,806,347 9/1957 Fertile 60/308 X cape of exhaust gases 3,520,131 7/1970 Briggs 60/308 3,551,005 12/1970 Brun 285/10 2 Claims, 2 Drawing Figures US. Patent Oct. 7,1975

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to connection conduits or pipes for directing the exhaust gases from a turbosupercharger through an adjacent wall. It is particularly useful in vehicles in which the wall is one part of an enclosure surrounding an engine equipped with a turbosupercharger, although it is not'limited to such use.

2. Description of the Prior Art It is known that turbine driven superchargers, or turbo-superchargers as they are referred to herein, operate at high temperatures, that is, the turbine, which is driven by exhaust gases from the engine operates 'at high temperatures. Because of such high temperatures the metal of which the gas turbine housing is made loses considerable strength as compared to its strength at a lower temperature, and this produces difficulties in providing a satisfactory exhaust pipe or conduit connected to the turbine ,lt using for directing the exhaust gases away from the turbo-supercharger. The stresses on the housing must be minimized. The problem is particulary acute when it is necessary that the exhaust pipe or conduit must pass through the wall of an enclosure so that the exhaust gases are discharged outside or on the other side of the wall.

It will be appreciated by those skilled in the art that in a turbo-supercharger installation on a diesel engine, for example, where the diesel engine is in a vehicle which includes an enclosure for the engine, that there is considerable vibration of the engine during operation. This means relative movement between the turbosupercharger on the engine and the surrounding enclosure and thus considerable care must be exercised in providing an exhaust conduit or pipe through the enclosure wall for the gases emanating from the turbosupercharger so as not to place undue stress on the housing of the gas turbine which might cause such housing to be damaged.

It has been common heretofore to use a slip joint type connection in which a conduit portion connected to the supercharger housing is received inside a somewhat larger conduit portion which is secured to the wall or housing. The slide connection is generally constructed in such a manner as to allow sufficient motion due to vibration of the engine and also expansion of various parts when they are heated so that there will not be sufficient stress placed on the turbo-supercharger housing to damage such housing. Such connections, however, are inefficient insofar as transmitting the exhaust gases are concerned and particularly so if the connection happens to be in a stream of fast moving air resulting from the engine cooling fan as is frequently the case. That is, a considerable amount of exhaust gases may be discharged through the connection instead of out through the end of the exhaust pipe outside of the enclosure, and it is desirable to improve the efliciency and construction of such connections.

SUMMARY OF THE INVENTION In carrying out my invention in one preferred form thereof I provide a first rigid conduit member which is connected to the turbo-supercharger and extends away from the supercharger. This conduit has a baffle portion at its outer extremity. A second rigid conduit member is connected to and extends through an adjacent wall or enclosure, the second conduit member being in alignment with the first conduit member forreceiving exhaust gases from the first conduit and transmitting them through the wall. The baffle portion forms a reservoir which contains a liquid. The end of the second conduit member extends into the liquid and forms a seal for preventing the escape of exhaust gases.

BRIEF DESCRIPTION OF THE DRAWING DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1 of the drawing, there is shown a fragmentary portion of a heavy duty vehicle which is indicated generally by the numeral 10. Included in the vehicle is a diesel engine 12, and mounted on and operating in conjunction with the diesel engine is a turbosupercharger indicated generally at 14. The turbosupercharger includes a gas turbine at 16 with an exhaust housing indicated at 18 through which hot gases are discharged from the turbo-supercharger.

Connected to exhaust housing 18 by means of a rigid coupling 20 is a rigid conduit member 22 which is shown as having an elbow shape. In this preferred embodiment the crosssection of the the conduit 22 is circular. The upwardly extending outer extremity or terminal portion 24 of the conduit. 22 has baffle portion 38 thereon described in detail hereinafter.

In alignment with the outlet of the conduit member 22 and arranged to receive gases therefrom and discharge them to the atmosphere is a second rigid conduit member 26. As shown, conduit member 26 is in alignment with the outer end of conduit portion 22. Conduit member 26 is secured! rigidly at 28 to the upper wall 30 of an enclosure which surrounds the engine 12. As shown, the engine drives a fan 32 which in this instance is a so-called pusher fan. The fan operates in a direction which causes cooling air to be drawn in the direction of the arrows 34 transversely past the connection, indicated generally at 48, between the two conduits and after passing through the fan such cooling air passes through a radiator which is indicated at 36.

Near the outer extremity 24 of conduit 22 and secured thereto is an annular baffle portion 38 which produces an annular space 40. The baffle 38 is sealed to the conduit member 22 so that space 40 forms a reservoir, and in the reservoir is a suitable liquid 45 such as mercury, as shown best in FIG. 2.

Conduit member 26 similarly has an annular baffle portion 44 secured thereon near the entrance end, having a depending portion to produce an annular chamber 46 in which is located a part of baffle portion 38 as shown on the drawing, although baffle 44 is not essential to the invention in its broader aspect and may be omitted in some instances. Baffle 44 is useful in preventing foreign material from getting into reservoir 40, and is also useful in strengthening the connection and in preventing the escape of the liquid in the reservoir. As is seen best in FIG. 2, the entrance end 42 of conduit member 26 extends downwardly below the surface of liquid 45 to provide a seal which prevents the flow of exhaust gases from inside conduit 22, 26 through the connection 48. Thus, there is provided a nonrigid connection between conduit 22 and conduit 26 which is nevertheless sealed to prevent the escape of the exhaust gases.

It will be appreciated that it is desirable to construct the connection 48 with small clearances so as to minimize the amount of liquid required and also assist in containing the liquid in the reservoir. It will be appreciated also that it is not essential that the baffle portions have the specific configurations illustrated. Other equivalent configurations can be used.

It is not critical to construct the connection 48 in such a way as to completely avoid contact between conduit member 26 and conduit member 22 and their respective baffle portions under all circumstances. That is, some contact under operating conditions when there is considerable vibration is not objectionable as long as it does not produce undue stress on exhaust housing 18 of the turbo-supercharger.

While I have disclosed herein the best mode contemplated for carrying out my invention as required by statute, it will be appreciated that modifications may be made by those skilled in the art. Accordingly, it should be understood that I intend to cover by the appended claims all such modifications which fall within the true spirit and scope of my invention.

I claim:

1. An exhaust construction for a turbo-supercharger on an engine, having a wall adjacent the engine through which exhaust gases are discharged, comprising a first rigid conduit member connected to and extending away from the turbo-supercharger and having an upwardly extending terminal portion, a baffle portion attached to the outer extremity of the said first conduit member forming a reservoir, a liquid in said reservoir, a second rigid conduit member secured to and extending through the wall, the said second conduit member aligned with the said first conduit member for receiving exhaust gases therefrom and transmitting them through the wall, and the entrance end of the second conduit member extending downwardly into the said liquid, whereby to provide a non-rigid connection between the said first and second conduit members and a seal for preventing the escape of exhaust gases.

2. An exhaust construction as in claim 1 in which there is an additional baffle portion attached to the said entrance end of the second conduit member, the said additional baffle portion including a depending portion 

1. An exhaust construction for a turbo-supercharger on an engine, having a wall adjacent the engine through which exhaust gases are discharged, comprising a first rigid conduit member connected to and extending away from the turbo-supercharger and having an upwardly extending terminal portion, a baffle portion attached to the outer extremity of the said first conduit member forming a reservoir, a liquid in said reservoir, a second rigid conduit member secured to and extending through the wall, the said second conduit member aligned with the said first conduit member for receiving exhaust gases therefrom and transmitting them through the wall, and the entrance end of the second conduit member extending downwardly into the said liquid, whereby to provide a non-rigid connection between the said first and second conduit members and a seal for preventing the escape of exhaust gases.
 2. An exhaust construction as in claim 1 in which there is an additional baffle portion attached to the said entrance end of the second conduit member, the said additional baffle portion including a depending portion surrounding the first mentioned baffle portion. 